89 lines
3.2 KiB
C#
89 lines
3.2 KiB
C#
using FastGithub.Configuration;
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using System;
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using System.Linq;
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using System.Net;
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using System.Net.NetworkInformation;
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namespace FastGithub.Dns
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{
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/// <summary>
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/// 系统域名服务工具
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/// </summary>
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static class SystemDnsUtil
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{
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/// <summary>
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/// 设置为主dns
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/// </summary>
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/// <exception cref="FastGithubException"></exception>
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public static void SetAsPrimitiveDns()
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{
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var @interface = GetOutboundNetworkInterface();
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if (@interface == null)
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{
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throw new FastGithubException($"找不到匹配的网络适配器来设置主DNS");
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}
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var dnsAddresses = @interface.GetIPProperties().DnsAddresses;
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var firstRecord = dnsAddresses.FirstOrDefault();
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if (firstRecord == null || LocalMachine.ContainsIPAddress(firstRecord) == false)
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{
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var primitive = IPAddress.Loopback;
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if (OperatingSystem.IsLinux())
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{
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throw new FastGithubException($"不支持自动设置本机DNS，请手工添加{primitive}做为/etc/resolv.conf的第一条记录");
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}
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else if (OperatingSystem.IsMacOS())
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{
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throw new FastGithubException($"不支持自动设置本机DNS，请手工添加{primitive}做为连接网络的DNS的第一条记录");
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}
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}
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}
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/// <summary>
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/// 从主dns移除
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/// </summary>
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/// <exception cref="FastGithubException"></exception>
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public static void RemoveFromPrimitiveDns()
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{
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var @interface = GetOutboundNetworkInterface();
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if (@interface == null)
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{
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throw new FastGithubException($"找不到匹配的网络适配器来移除主DNS");
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}
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var dnsAddresses = @interface.GetIPProperties().DnsAddresses;
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var firstRecord = dnsAddresses.FirstOrDefault();
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if (firstRecord != null && LocalMachine.ContainsIPAddress(firstRecord))
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{
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if (OperatingSystem.IsLinux())
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{
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throw new FastGithubException($"不支持自动移除本机主DNS，请手工移除/etc/resolv.conf的第一条记录");
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}
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else if (OperatingSystem.IsMacOS())
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{
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throw new FastGithubException($"不支持自动移除本机主DNS，请手工移除连接网络的DNS的第一条记录");
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}
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}
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}
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/// <summary>
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/// 查找出口的网络适器
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/// </summary>
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/// <returns></returns>
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private static NetworkInterface? GetOutboundNetworkInterface()
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{
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var remoteEndPoint = new IPEndPoint(IPAddress.Parse("1.1.1.1"), 53);
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var address = LocalMachine.GetLocalIPAddress(remoteEndPoint);
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if (address == null)
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{
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return default;
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}
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return NetworkInterface
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.GetAllNetworkInterfaces()
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.Where(item => item.GetIPProperties().UnicastAddresses.Any(a => a.Address.Equals(address)))
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.FirstOrDefault();
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}
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}
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} |